#!/usr/bin/env bash
# Python 虚拟环境安装脚本
set -e
cd "$(dirname "$0")"

# 1. 若尚未安装 python3-venv，请先执行（需要输入密码）：
#    sudo apt install -y python3.10-venv python3-pip

if ! python3 -c "import ensurepip" 2>/dev/null; then
  echo "错误: 未找到 ensurepip，无法创建虚拟环境。"
  echo "请先执行："
  echo "  sudo apt install -y python3.10-venv python3-pip"
  exit 1
fi

# 2. 删除可能存在的残缺 .venv
rm -rf .venv

# 3. 创建虚拟环境
python3 -m venv .venv

# 4. 激活并安装依赖
.venv/bin/pip install --upgrade pip
.venv/bin/pip install -r requirements.txt

echo ""
echo "✓ Python 环境已就绪。激活方式："
echo "  source backend/.venv/bin/activate"
echo "或直接运行："
echo "  backend/.venv/bin/python backend/app.py"
echo "  backend/.venv/bin/pytest backend/tests/"